1 /*
2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33 #include <linux/kernel.h>
34 #include <linux/random.h>
35 #include <linux/vmalloc.h>
36 #include <linux/hardirq.h>
37 #include <linux/mlx5/driver.h>
38 #include <linux/kern_levels.h>
39 #include "mlx5_core.h"
40 #include "lib/eq.h"
41 #include "lib/mlx5.h"
42 #include "lib/events.h"
43 #include "lib/pci_vsc.h"
44 #include "lib/tout.h"
45 #include "diag/fw_tracer.h"
46 #include "diag/reporter_vnic.h"
47
48 enum {
49 MAX_MISSES = 3,
50 };
51
52 enum {
53 MLX5_DROP_HEALTH_WORK,
54 };
55
56 enum {
57 MLX5_SENSOR_NO_ERR = 0,
58 MLX5_SENSOR_PCI_COMM_ERR = 1,
59 MLX5_SENSOR_PCI_ERR = 2,
60 MLX5_SENSOR_NIC_DISABLED = 3,
61 MLX5_SENSOR_NIC_SW_RESET = 4,
62 MLX5_SENSOR_FW_SYND_RFR = 5,
63 };
64
65 enum {
66 MLX5_SEVERITY_MASK = 0x7,
67 MLX5_SEVERITY_VALID_MASK = 0x8,
68 };
69
mlx5_get_nic_state(struct mlx5_core_dev * dev)70 u8 mlx5_get_nic_state(struct mlx5_core_dev *dev)
71 {
72 return (ioread32be(&dev->iseg->cmdq_addr_l_sz) >> 8) & 7;
73 }
74
mlx5_set_nic_state(struct mlx5_core_dev * dev,u8 state)75 void mlx5_set_nic_state(struct mlx5_core_dev *dev, u8 state)
76 {
77 u32 cur_cmdq_addr_l_sz;
78
79 cur_cmdq_addr_l_sz = ioread32be(&dev->iseg->cmdq_addr_l_sz);
80 iowrite32be((cur_cmdq_addr_l_sz & 0xFFFFF000) |
81 state << MLX5_NIC_IFC_OFFSET,
82 &dev->iseg->cmdq_addr_l_sz);
83 }
84
sensor_pci_not_working(struct mlx5_core_dev * dev)85 static bool sensor_pci_not_working(struct mlx5_core_dev *dev)
86 {
87 struct mlx5_core_health *health = &dev->priv.health;
88 struct health_buffer __iomem *h = health->health;
89
90 /* Offline PCI reads return 0xffffffff */
91 return (ioread32be(&h->fw_ver) == 0xffffffff);
92 }
93
mlx5_health_get_rfr(u8 rfr_severity)94 static int mlx5_health_get_rfr(u8 rfr_severity)
95 {
96 return rfr_severity >> MLX5_RFR_BIT_OFFSET;
97 }
98
sensor_fw_synd_rfr(struct mlx5_core_dev * dev)99 static bool sensor_fw_synd_rfr(struct mlx5_core_dev *dev)
100 {
101 struct mlx5_core_health *health = &dev->priv.health;
102 struct health_buffer __iomem *h = health->health;
103 u8 synd = ioread8(&h->synd);
104 u8 rfr;
105
106 rfr = mlx5_health_get_rfr(ioread8(&h->rfr_severity));
107
108 if (rfr && synd)
109 mlx5_core_dbg(dev, "FW requests reset, synd: %d\n", synd);
110 return rfr && synd;
111 }
112
mlx5_health_check_fatal_sensors(struct mlx5_core_dev * dev)113 u32 mlx5_health_check_fatal_sensors(struct mlx5_core_dev *dev)
114 {
115 if (sensor_pci_not_working(dev))
116 return MLX5_SENSOR_PCI_COMM_ERR;
117 if (pci_channel_offline(dev->pdev))
118 return MLX5_SENSOR_PCI_ERR;
119 if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_DISABLED)
120 return MLX5_SENSOR_NIC_DISABLED;
121 if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_SW_RESET)
122 return MLX5_SENSOR_NIC_SW_RESET;
123 if (sensor_fw_synd_rfr(dev))
124 return MLX5_SENSOR_FW_SYND_RFR;
125
126 return MLX5_SENSOR_NO_ERR;
127 }
128
lock_sem_sw_reset(struct mlx5_core_dev * dev,bool lock)129 static int lock_sem_sw_reset(struct mlx5_core_dev *dev, bool lock)
130 {
131 enum mlx5_vsc_state state;
132 int ret;
133
134 if (!mlx5_core_is_pf(dev))
135 return -EBUSY;
136
137 /* Try to lock GW access, this stage doesn't return
138 * EBUSY because locked GW does not mean that other PF
139 * already started the reset.
140 */
141 ret = mlx5_vsc_gw_lock(dev);
142 if (ret == -EBUSY)
143 return -EINVAL;
144 if (ret)
145 return ret;
146
147 state = lock ? MLX5_VSC_LOCK : MLX5_VSC_UNLOCK;
148 /* At this stage, if the return status == EBUSY, then we know
149 * for sure that another PF started the reset, so don't allow
150 * another reset.
151 */
152 ret = mlx5_vsc_sem_set_space(dev, MLX5_SEMAPHORE_SW_RESET, state);
153 if (ret)
154 mlx5_core_warn(dev, "Failed to lock SW reset semaphore\n");
155
156 /* Unlock GW access */
157 mlx5_vsc_gw_unlock(dev);
158
159 return ret;
160 }
161
reset_fw_if_needed(struct mlx5_core_dev * dev)162 static bool reset_fw_if_needed(struct mlx5_core_dev *dev)
163 {
164 bool supported = (ioread32be(&dev->iseg->initializing) >>
165 MLX5_FW_RESET_SUPPORTED_OFFSET) & 1;
166 u32 fatal_error;
167
168 if (!supported)
169 return false;
170
171 /* The reset only needs to be issued by one PF. The health buffer is
172 * shared between all functions, and will be cleared during a reset.
173 * Check again to avoid a redundant 2nd reset. If the fatal errors was
174 * PCI related a reset won't help.
175 */
176 fatal_error = mlx5_health_check_fatal_sensors(dev);
177 if (fatal_error == MLX5_SENSOR_PCI_COMM_ERR ||
178 fatal_error == MLX5_SENSOR_NIC_DISABLED ||
179 fatal_error == MLX5_SENSOR_NIC_SW_RESET) {
180 mlx5_core_warn(dev, "Not issuing FW reset. Either it's already done or won't help.");
181 return false;
182 }
183
184 mlx5_core_warn(dev, "Issuing FW Reset\n");
185 /* Write the NIC interface field to initiate the reset, the command
186 * interface address also resides here, don't overwrite it.
187 */
188 mlx5_set_nic_state(dev, MLX5_NIC_IFC_SW_RESET);
189
190 return true;
191 }
192
enter_error_state(struct mlx5_core_dev * dev,bool force)193 static void enter_error_state(struct mlx5_core_dev *dev, bool force)
194 {
195 if (mlx5_health_check_fatal_sensors(dev) || force) { /* protected state setting */
196 dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR;
197 mlx5_cmd_flush(dev);
198 }
199
200 mlx5_notifier_call_chain(dev->priv.events, MLX5_DEV_EVENT_SYS_ERROR, (void *)1);
201 }
202
mlx5_enter_error_state(struct mlx5_core_dev * dev,bool force)203 void mlx5_enter_error_state(struct mlx5_core_dev *dev, bool force)
204 {
205 bool err_detected = false;
206
207 /* Mark the device as fatal in order to abort FW commands */
208 if ((mlx5_health_check_fatal_sensors(dev) || force) &&
209 dev->state == MLX5_DEVICE_STATE_UP) {
210 dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR;
211 err_detected = true;
212 }
213 mutex_lock(&dev->intf_state_mutex);
214 if (!err_detected && dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
215 goto unlock;/* a previous error is still being handled */
216
217 enter_error_state(dev, force);
218 unlock:
219 mutex_unlock(&dev->intf_state_mutex);
220 }
221
mlx5_error_sw_reset(struct mlx5_core_dev * dev)222 void mlx5_error_sw_reset(struct mlx5_core_dev *dev)
223 {
224 unsigned long end, delay_ms = mlx5_tout_ms(dev, PCI_TOGGLE);
225 int lock = -EBUSY;
226
227 mutex_lock(&dev->intf_state_mutex);
228 if (dev->state != MLX5_DEVICE_STATE_INTERNAL_ERROR)
229 goto unlock;
230
231 mlx5_core_err(dev, "start\n");
232
233 if (mlx5_health_check_fatal_sensors(dev) == MLX5_SENSOR_FW_SYND_RFR) {
234 /* Get cr-dump and reset FW semaphore */
235 lock = lock_sem_sw_reset(dev, true);
236
237 if (lock == -EBUSY) {
238 delay_ms = mlx5_tout_ms(dev, FULL_CRDUMP);
239 goto recover_from_sw_reset;
240 }
241 /* Execute SW reset */
242 reset_fw_if_needed(dev);
243 }
244
245 recover_from_sw_reset:
246 /* Recover from SW reset */
247 end = jiffies + msecs_to_jiffies(delay_ms);
248 do {
249 if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_DISABLED)
250 break;
251
252 msleep(20);
253 } while (!time_after(jiffies, end));
254
255 if (mlx5_get_nic_state(dev) != MLX5_NIC_IFC_DISABLED) {
256 dev_err(&dev->pdev->dev, "NIC IFC still %d after %lums.\n",
257 mlx5_get_nic_state(dev), delay_ms);
258 }
259
260 /* Release FW semaphore if you are the lock owner */
261 if (!lock)
262 lock_sem_sw_reset(dev, false);
263
264 mlx5_core_err(dev, "end\n");
265
266 unlock:
267 mutex_unlock(&dev->intf_state_mutex);
268 }
269
mlx5_handle_bad_state(struct mlx5_core_dev * dev)270 static void mlx5_handle_bad_state(struct mlx5_core_dev *dev)
271 {
272 u8 nic_interface = mlx5_get_nic_state(dev);
273
274 switch (nic_interface) {
275 case MLX5_NIC_IFC_FULL:
276 mlx5_core_warn(dev, "Expected to see disabled NIC but it is full driver\n");
277 break;
278
279 case MLX5_NIC_IFC_DISABLED:
280 mlx5_core_warn(dev, "starting teardown\n");
281 break;
282
283 case MLX5_NIC_IFC_NO_DRAM_NIC:
284 mlx5_core_warn(dev, "Expected to see disabled NIC but it is no dram nic\n");
285 break;
286
287 case MLX5_NIC_IFC_SW_RESET:
288 /* The IFC mode field is 3 bits, so it will read 0x7 in 2 cases:
289 * 1. PCI has been disabled (ie. PCI-AER, PF driver unloaded
290 * and this is a VF), this is not recoverable by SW reset.
291 * Logging of this is handled elsewhere.
292 * 2. FW reset has been issued by another function, driver can
293 * be reloaded to recover after the mode switches to
294 * MLX5_NIC_IFC_DISABLED.
295 */
296 if (dev->priv.health.fatal_error != MLX5_SENSOR_PCI_COMM_ERR)
297 mlx5_core_warn(dev, "NIC SW reset in progress\n");
298 break;
299
300 default:
301 mlx5_core_warn(dev, "Expected to see disabled NIC but it is has invalid value %d\n",
302 nic_interface);
303 }
304
305 mlx5_disable_device(dev);
306 }
307
mlx5_health_wait_pci_up(struct mlx5_core_dev * dev)308 int mlx5_health_wait_pci_up(struct mlx5_core_dev *dev)
309 {
310 unsigned long end;
311
312 end = jiffies + msecs_to_jiffies(mlx5_tout_ms(dev, FW_RESET));
313 while (sensor_pci_not_working(dev)) {
314 if (time_after(jiffies, end))
315 return -ETIMEDOUT;
316 if (test_bit(MLX5_BREAK_FW_WAIT, &dev->intf_state)) {
317 mlx5_core_warn(dev, "device is being removed, stop waiting for PCI\n");
318 return -ENODEV;
319 }
320 msleep(100);
321 }
322 return 0;
323 }
324
mlx5_health_try_recover(struct mlx5_core_dev * dev)325 static int mlx5_health_try_recover(struct mlx5_core_dev *dev)
326 {
327 mlx5_core_warn(dev, "handling bad device here\n");
328 mlx5_handle_bad_state(dev);
329 if (mlx5_health_wait_pci_up(dev)) {
330 mlx5_core_err(dev, "health recovery flow aborted, PCI reads still not working\n");
331 return -EIO;
332 }
333 mlx5_core_err(dev, "starting health recovery flow\n");
334 if (mlx5_recover_device(dev) || mlx5_health_check_fatal_sensors(dev)) {
335 mlx5_core_err(dev, "health recovery failed\n");
336 return -EIO;
337 }
338
339 mlx5_core_info(dev, "health recovery succeeded\n");
340 return 0;
341 }
342
hsynd_str(u8 synd)343 static const char *hsynd_str(u8 synd)
344 {
345 switch (synd) {
346 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_FW_INTERNAL_ERR:
347 return "firmware internal error";
348 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_DEAD_IRISC:
349 return "irisc not responding";
350 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_HW_FATAL_ERR:
351 return "unrecoverable hardware error";
352 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_FW_CRC_ERR:
353 return "firmware CRC error";
354 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_ICM_FETCH_PCI_ERR:
355 return "ICM fetch PCI error";
356 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_ICM_PAGE_ERR:
357 return "HW fatal error\n";
358 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_ASYNCHRONOUS_EQ_BUF_OVERRUN:
359 return "async EQ buffer overrun";
360 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_EQ_IN_ERR:
361 return "EQ error";
362 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_EQ_INV:
363 return "Invalid EQ referenced";
364 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_FFSER_ERR:
365 return "FFSER error";
366 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_HIGH_TEMP_ERR:
367 return "High temperature";
368 default:
369 return "unrecognized error";
370 }
371 }
372
mlx5_loglevel_str(int level)373 static const char *mlx5_loglevel_str(int level)
374 {
375 switch (level) {
376 case LOGLEVEL_EMERG:
377 return "EMERGENCY";
378 case LOGLEVEL_ALERT:
379 return "ALERT";
380 case LOGLEVEL_CRIT:
381 return "CRITICAL";
382 case LOGLEVEL_ERR:
383 return "ERROR";
384 case LOGLEVEL_WARNING:
385 return "WARNING";
386 case LOGLEVEL_NOTICE:
387 return "NOTICE";
388 case LOGLEVEL_INFO:
389 return "INFO";
390 case LOGLEVEL_DEBUG:
391 return "DEBUG";
392 }
393 return "Unknown log level";
394 }
395
mlx5_health_get_severity(u8 rfr_severity)396 static int mlx5_health_get_severity(u8 rfr_severity)
397 {
398 return rfr_severity & MLX5_SEVERITY_VALID_MASK ?
399 rfr_severity & MLX5_SEVERITY_MASK : LOGLEVEL_ERR;
400 }
401
print_health_info(struct mlx5_core_dev * dev)402 static void print_health_info(struct mlx5_core_dev *dev)
403 {
404 struct mlx5_core_health *health = &dev->priv.health;
405 struct health_buffer __iomem *h = health->health;
406 u8 rfr_severity;
407 int severity;
408 int i;
409
410 /* If the syndrome is 0, the device is OK and no need to print buffer */
411 if (!ioread8(&h->synd))
412 return;
413
414 if (ioread32be(&h->fw_ver) == 0xFFFFFFFF) {
415 mlx5_log(dev, LOGLEVEL_ERR, "PCI slot is unavailable\n");
416 return;
417 }
418
419 rfr_severity = ioread8(&h->rfr_severity);
420 severity = mlx5_health_get_severity(rfr_severity);
421 mlx5_log(dev, severity, "Health issue observed, %s, severity(%d) %s:\n",
422 hsynd_str(ioread8(&h->synd)), severity, mlx5_loglevel_str(severity));
423
424 for (i = 0; i < ARRAY_SIZE(h->assert_var); i++)
425 mlx5_log(dev, severity, "assert_var[%d] 0x%08x\n", i,
426 ioread32be(h->assert_var + i));
427
428 mlx5_log(dev, severity, "assert_exit_ptr 0x%08x\n", ioread32be(&h->assert_exit_ptr));
429 mlx5_log(dev, severity, "assert_callra 0x%08x\n", ioread32be(&h->assert_callra));
430 mlx5_log(dev, severity, "fw_ver %d.%d.%d", fw_rev_maj(dev), fw_rev_min(dev),
431 fw_rev_sub(dev));
432 mlx5_log(dev, severity, "time %u\n", ioread32be(&h->time));
433 mlx5_log(dev, severity, "hw_id 0x%08x\n", ioread32be(&h->hw_id));
434 mlx5_log(dev, severity, "rfr %d\n", mlx5_health_get_rfr(rfr_severity));
435 mlx5_log(dev, severity, "severity %d (%s)\n", severity, mlx5_loglevel_str(severity));
436 mlx5_log(dev, severity, "irisc_index %d\n", ioread8(&h->irisc_index));
437 mlx5_log(dev, severity, "synd 0x%x: %s\n", ioread8(&h->synd),
438 hsynd_str(ioread8(&h->synd)));
439 mlx5_log(dev, severity, "ext_synd 0x%04x\n", ioread16be(&h->ext_synd));
440 mlx5_log(dev, severity, "raw fw_ver 0x%08x\n", ioread32be(&h->fw_ver));
441 }
442
443 static int
mlx5_fw_reporter_diagnose(struct devlink_health_reporter * reporter,struct devlink_fmsg * fmsg,struct netlink_ext_ack * extack)444 mlx5_fw_reporter_diagnose(struct devlink_health_reporter *reporter,
445 struct devlink_fmsg *fmsg,
446 struct netlink_ext_ack *extack)
447 {
448 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
449 struct mlx5_core_health *health = &dev->priv.health;
450 struct health_buffer __iomem *h = health->health;
451 u8 synd;
452 int err;
453
454 synd = ioread8(&h->synd);
455 err = devlink_fmsg_u8_pair_put(fmsg, "Syndrome", synd);
456 if (err || !synd)
457 return err;
458 return devlink_fmsg_string_pair_put(fmsg, "Description", hsynd_str(synd));
459 }
460
461 struct mlx5_fw_reporter_ctx {
462 u8 err_synd;
463 int miss_counter;
464 };
465
466 static int
mlx5_fw_reporter_ctx_pairs_put(struct devlink_fmsg * fmsg,struct mlx5_fw_reporter_ctx * fw_reporter_ctx)467 mlx5_fw_reporter_ctx_pairs_put(struct devlink_fmsg *fmsg,
468 struct mlx5_fw_reporter_ctx *fw_reporter_ctx)
469 {
470 int err;
471
472 err = devlink_fmsg_u8_pair_put(fmsg, "syndrome",
473 fw_reporter_ctx->err_synd);
474 if (err)
475 return err;
476 err = devlink_fmsg_u32_pair_put(fmsg, "fw_miss_counter",
477 fw_reporter_ctx->miss_counter);
478 if (err)
479 return err;
480 return 0;
481 }
482
483 static int
mlx5_fw_reporter_heath_buffer_data_put(struct mlx5_core_dev * dev,struct devlink_fmsg * fmsg)484 mlx5_fw_reporter_heath_buffer_data_put(struct mlx5_core_dev *dev,
485 struct devlink_fmsg *fmsg)
486 {
487 struct mlx5_core_health *health = &dev->priv.health;
488 struct health_buffer __iomem *h = health->health;
489 u8 rfr_severity;
490 int err;
491 int i;
492
493 if (!ioread8(&h->synd))
494 return 0;
495
496 err = devlink_fmsg_pair_nest_start(fmsg, "health buffer");
497 if (err)
498 return err;
499 err = devlink_fmsg_obj_nest_start(fmsg);
500 if (err)
501 return err;
502 err = devlink_fmsg_arr_pair_nest_start(fmsg, "assert_var");
503 if (err)
504 return err;
505
506 for (i = 0; i < ARRAY_SIZE(h->assert_var); i++) {
507 err = devlink_fmsg_u32_put(fmsg, ioread32be(h->assert_var + i));
508 if (err)
509 return err;
510 }
511 err = devlink_fmsg_arr_pair_nest_end(fmsg);
512 if (err)
513 return err;
514 err = devlink_fmsg_u32_pair_put(fmsg, "assert_exit_ptr",
515 ioread32be(&h->assert_exit_ptr));
516 if (err)
517 return err;
518 err = devlink_fmsg_u32_pair_put(fmsg, "assert_callra",
519 ioread32be(&h->assert_callra));
520 if (err)
521 return err;
522 err = devlink_fmsg_u32_pair_put(fmsg, "time", ioread32be(&h->time));
523 if (err)
524 return err;
525 err = devlink_fmsg_u32_pair_put(fmsg, "hw_id", ioread32be(&h->hw_id));
526 if (err)
527 return err;
528 rfr_severity = ioread8(&h->rfr_severity);
529 err = devlink_fmsg_u8_pair_put(fmsg, "rfr", mlx5_health_get_rfr(rfr_severity));
530 if (err)
531 return err;
532 err = devlink_fmsg_u8_pair_put(fmsg, "severity", mlx5_health_get_severity(rfr_severity));
533 if (err)
534 return err;
535 err = devlink_fmsg_u8_pair_put(fmsg, "irisc_index",
536 ioread8(&h->irisc_index));
537 if (err)
538 return err;
539 err = devlink_fmsg_u8_pair_put(fmsg, "synd", ioread8(&h->synd));
540 if (err)
541 return err;
542 err = devlink_fmsg_u32_pair_put(fmsg, "ext_synd",
543 ioread16be(&h->ext_synd));
544 if (err)
545 return err;
546 err = devlink_fmsg_u32_pair_put(fmsg, "raw_fw_ver",
547 ioread32be(&h->fw_ver));
548 if (err)
549 return err;
550 err = devlink_fmsg_obj_nest_end(fmsg);
551 if (err)
552 return err;
553 return devlink_fmsg_pair_nest_end(fmsg);
554 }
555
556 static int
mlx5_fw_reporter_dump(struct devlink_health_reporter * reporter,struct devlink_fmsg * fmsg,void * priv_ctx,struct netlink_ext_ack * extack)557 mlx5_fw_reporter_dump(struct devlink_health_reporter *reporter,
558 struct devlink_fmsg *fmsg, void *priv_ctx,
559 struct netlink_ext_ack *extack)
560 {
561 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
562 int err;
563
564 err = mlx5_fw_tracer_trigger_core_dump_general(dev);
565 if (err)
566 return err;
567
568 if (priv_ctx) {
569 struct mlx5_fw_reporter_ctx *fw_reporter_ctx = priv_ctx;
570
571 err = mlx5_fw_reporter_ctx_pairs_put(fmsg, fw_reporter_ctx);
572 if (err)
573 return err;
574 }
575
576 err = mlx5_fw_reporter_heath_buffer_data_put(dev, fmsg);
577 if (err)
578 return err;
579 return mlx5_fw_tracer_get_saved_traces_objects(dev->tracer, fmsg);
580 }
581
mlx5_fw_reporter_err_work(struct work_struct * work)582 static void mlx5_fw_reporter_err_work(struct work_struct *work)
583 {
584 struct mlx5_fw_reporter_ctx fw_reporter_ctx;
585 struct mlx5_core_health *health;
586
587 health = container_of(work, struct mlx5_core_health, report_work);
588
589 if (IS_ERR_OR_NULL(health->fw_reporter))
590 return;
591
592 fw_reporter_ctx.err_synd = health->synd;
593 fw_reporter_ctx.miss_counter = health->miss_counter;
594 if (fw_reporter_ctx.err_synd) {
595 devlink_health_report(health->fw_reporter,
596 "FW syndrome reported", &fw_reporter_ctx);
597 return;
598 }
599 if (fw_reporter_ctx.miss_counter)
600 devlink_health_report(health->fw_reporter,
601 "FW miss counter reported",
602 &fw_reporter_ctx);
603 }
604
605 static const struct devlink_health_reporter_ops mlx5_fw_reporter_ops = {
606 .name = "fw",
607 .diagnose = mlx5_fw_reporter_diagnose,
608 .dump = mlx5_fw_reporter_dump,
609 };
610
611 static int
mlx5_fw_fatal_reporter_recover(struct devlink_health_reporter * reporter,void * priv_ctx,struct netlink_ext_ack * extack)612 mlx5_fw_fatal_reporter_recover(struct devlink_health_reporter *reporter,
613 void *priv_ctx,
614 struct netlink_ext_ack *extack)
615 {
616 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
617
618 return mlx5_health_try_recover(dev);
619 }
620
621 static int
mlx5_fw_fatal_reporter_dump(struct devlink_health_reporter * reporter,struct devlink_fmsg * fmsg,void * priv_ctx,struct netlink_ext_ack * extack)622 mlx5_fw_fatal_reporter_dump(struct devlink_health_reporter *reporter,
623 struct devlink_fmsg *fmsg, void *priv_ctx,
624 struct netlink_ext_ack *extack)
625 {
626 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
627 u32 crdump_size = dev->priv.health.crdump_size;
628 u32 *cr_data;
629 int err;
630
631 if (!mlx5_core_is_pf(dev))
632 return -EPERM;
633
634 cr_data = kvmalloc(crdump_size, GFP_KERNEL);
635 if (!cr_data)
636 return -ENOMEM;
637 err = mlx5_crdump_collect(dev, cr_data);
638 if (err)
639 goto free_data;
640
641 if (priv_ctx) {
642 struct mlx5_fw_reporter_ctx *fw_reporter_ctx = priv_ctx;
643
644 err = mlx5_fw_reporter_ctx_pairs_put(fmsg, fw_reporter_ctx);
645 if (err)
646 goto free_data;
647 }
648
649 err = devlink_fmsg_binary_pair_put(fmsg, "crdump_data", cr_data, crdump_size);
650
651 free_data:
652 kvfree(cr_data);
653 return err;
654 }
655
mlx5_fw_fatal_reporter_err_work(struct work_struct * work)656 static void mlx5_fw_fatal_reporter_err_work(struct work_struct *work)
657 {
658 struct mlx5_fw_reporter_ctx fw_reporter_ctx;
659 struct mlx5_core_health *health;
660 struct mlx5_core_dev *dev;
661 struct devlink *devlink;
662 struct mlx5_priv *priv;
663
664 health = container_of(work, struct mlx5_core_health, fatal_report_work);
665 priv = container_of(health, struct mlx5_priv, health);
666 dev = container_of(priv, struct mlx5_core_dev, priv);
667 devlink = priv_to_devlink(dev);
668
669 mutex_lock(&dev->intf_state_mutex);
670 if (test_bit(MLX5_DROP_HEALTH_WORK, &health->flags)) {
671 mlx5_core_err(dev, "health works are not permitted at this stage\n");
672 mutex_unlock(&dev->intf_state_mutex);
673 return;
674 }
675 mutex_unlock(&dev->intf_state_mutex);
676 enter_error_state(dev, false);
677 if (IS_ERR_OR_NULL(health->fw_fatal_reporter)) {
678 devl_lock(devlink);
679 if (mlx5_health_try_recover(dev))
680 mlx5_core_err(dev, "health recovery failed\n");
681 devl_unlock(devlink);
682 return;
683 }
684 fw_reporter_ctx.err_synd = health->synd;
685 fw_reporter_ctx.miss_counter = health->miss_counter;
686 if (devlink_health_report(health->fw_fatal_reporter,
687 "FW fatal error reported", &fw_reporter_ctx) == -ECANCELED) {
688 /* If recovery wasn't performed, due to grace period,
689 * unload the driver. This ensures that the driver
690 * closes all its resources and it is not subjected to
691 * requests from the kernel.
692 */
693 mlx5_core_err(dev, "Driver is in error state. Unloading\n");
694 mlx5_unload_one(dev, false);
695 }
696 }
697
698 static const struct devlink_health_reporter_ops mlx5_fw_fatal_reporter_ops = {
699 .name = "fw_fatal",
700 .recover = mlx5_fw_fatal_reporter_recover,
701 .dump = mlx5_fw_fatal_reporter_dump,
702 };
703
704 #define MLX5_FW_REPORTER_ECPF_GRACEFUL_PERIOD 180000
705 #define MLX5_FW_REPORTER_PF_GRACEFUL_PERIOD 60000
706 #define MLX5_FW_REPORTER_VF_GRACEFUL_PERIOD 30000
707 #define MLX5_FW_REPORTER_DEFAULT_GRACEFUL_PERIOD MLX5_FW_REPORTER_VF_GRACEFUL_PERIOD
708
mlx5_fw_reporters_create(struct mlx5_core_dev * dev)709 void mlx5_fw_reporters_create(struct mlx5_core_dev *dev)
710 {
711 struct mlx5_core_health *health = &dev->priv.health;
712 struct devlink *devlink = priv_to_devlink(dev);
713 u64 grace_period;
714
715 if (mlx5_core_is_ecpf(dev)) {
716 grace_period = MLX5_FW_REPORTER_ECPF_GRACEFUL_PERIOD;
717 } else if (mlx5_core_is_pf(dev)) {
718 grace_period = MLX5_FW_REPORTER_PF_GRACEFUL_PERIOD;
719 } else {
720 /* VF or SF */
721 grace_period = MLX5_FW_REPORTER_DEFAULT_GRACEFUL_PERIOD;
722 }
723
724 health->fw_reporter =
725 devl_health_reporter_create(devlink, &mlx5_fw_reporter_ops,
726 0, dev);
727 if (IS_ERR(health->fw_reporter))
728 mlx5_core_warn(dev, "Failed to create fw reporter, err = %ld\n",
729 PTR_ERR(health->fw_reporter));
730
731 health->fw_fatal_reporter =
732 devl_health_reporter_create(devlink,
733 &mlx5_fw_fatal_reporter_ops,
734 grace_period,
735 dev);
736 if (IS_ERR(health->fw_fatal_reporter))
737 mlx5_core_warn(dev, "Failed to create fw fatal reporter, err = %ld\n",
738 PTR_ERR(health->fw_fatal_reporter));
739 }
740
mlx5_fw_reporters_destroy(struct mlx5_core_dev * dev)741 static void mlx5_fw_reporters_destroy(struct mlx5_core_dev *dev)
742 {
743 struct mlx5_core_health *health = &dev->priv.health;
744
745 if (!IS_ERR_OR_NULL(health->fw_reporter))
746 devlink_health_reporter_destroy(health->fw_reporter);
747
748 if (!IS_ERR_OR_NULL(health->fw_fatal_reporter))
749 devlink_health_reporter_destroy(health->fw_fatal_reporter);
750 }
751
get_next_poll_jiffies(struct mlx5_core_dev * dev)752 static unsigned long get_next_poll_jiffies(struct mlx5_core_dev *dev)
753 {
754 unsigned long next;
755
756 get_random_bytes(&next, sizeof(next));
757 next %= HZ;
758 next += jiffies + msecs_to_jiffies(mlx5_tout_ms(dev, HEALTH_POLL_INTERVAL));
759
760 return next;
761 }
762
mlx5_trigger_health_work(struct mlx5_core_dev * dev)763 void mlx5_trigger_health_work(struct mlx5_core_dev *dev)
764 {
765 struct mlx5_core_health *health = &dev->priv.health;
766
767 if (!mlx5_dev_is_lightweight(dev))
768 queue_work(health->wq, &health->fatal_report_work);
769 }
770
771 #define MLX5_MSEC_PER_HOUR (MSEC_PER_SEC * 60 * 60)
mlx5_health_log_ts_update(struct work_struct * work)772 static void mlx5_health_log_ts_update(struct work_struct *work)
773 {
774 struct delayed_work *dwork = to_delayed_work(work);
775 u32 out[MLX5_ST_SZ_DW(mrtc_reg)] = {};
776 u32 in[MLX5_ST_SZ_DW(mrtc_reg)] = {};
777 struct mlx5_core_health *health;
778 struct mlx5_core_dev *dev;
779 struct mlx5_priv *priv;
780 u64 now_us;
781
782 health = container_of(dwork, struct mlx5_core_health, update_fw_log_ts_work);
783 priv = container_of(health, struct mlx5_priv, health);
784 dev = container_of(priv, struct mlx5_core_dev, priv);
785
786 now_us = ktime_to_us(ktime_get_real());
787
788 MLX5_SET(mrtc_reg, in, time_h, now_us >> 32);
789 MLX5_SET(mrtc_reg, in, time_l, now_us & 0xFFFFFFFF);
790 mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), MLX5_REG_MRTC, 0, 1);
791
792 queue_delayed_work(health->wq, &health->update_fw_log_ts_work,
793 msecs_to_jiffies(MLX5_MSEC_PER_HOUR));
794 }
795
poll_health(struct timer_list * t)796 static void poll_health(struct timer_list *t)
797 {
798 struct mlx5_core_dev *dev = from_timer(dev, t, priv.health.timer);
799 struct mlx5_core_health *health = &dev->priv.health;
800 struct health_buffer __iomem *h = health->health;
801 u32 fatal_error;
802 u8 prev_synd;
803 u32 count;
804
805 if (dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
806 goto out;
807
808 fatal_error = mlx5_health_check_fatal_sensors(dev);
809
810 if (fatal_error && !health->fatal_error) {
811 mlx5_core_err(dev, "Fatal error %u detected\n", fatal_error);
812 dev->priv.health.fatal_error = fatal_error;
813 print_health_info(dev);
814 dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR;
815 mlx5_trigger_health_work(dev);
816 return;
817 }
818
819 count = ioread32be(health->health_counter);
820 if (count == health->prev)
821 ++health->miss_counter;
822 else
823 health->miss_counter = 0;
824
825 health->prev = count;
826 if (health->miss_counter == MAX_MISSES) {
827 mlx5_core_err(dev, "device's health compromised - reached miss count\n");
828 print_health_info(dev);
829 queue_work(health->wq, &health->report_work);
830 }
831
832 prev_synd = health->synd;
833 health->synd = ioread8(&h->synd);
834 if (health->synd && health->synd != prev_synd)
835 queue_work(health->wq, &health->report_work);
836
837 out:
838 mod_timer(&health->timer, get_next_poll_jiffies(dev));
839 }
840
mlx5_start_health_poll(struct mlx5_core_dev * dev)841 void mlx5_start_health_poll(struct mlx5_core_dev *dev)
842 {
843 u64 poll_interval_ms = mlx5_tout_ms(dev, HEALTH_POLL_INTERVAL);
844 struct mlx5_core_health *health = &dev->priv.health;
845
846 timer_setup(&health->timer, poll_health, 0);
847 health->fatal_error = MLX5_SENSOR_NO_ERR;
848 clear_bit(MLX5_DROP_HEALTH_WORK, &health->flags);
849 health->health = &dev->iseg->health;
850 health->health_counter = &dev->iseg->health_counter;
851
852 health->timer.expires = jiffies + msecs_to_jiffies(poll_interval_ms);
853 add_timer(&health->timer);
854 }
855
mlx5_stop_health_poll(struct mlx5_core_dev * dev,bool disable_health)856 void mlx5_stop_health_poll(struct mlx5_core_dev *dev, bool disable_health)
857 {
858 struct mlx5_core_health *health = &dev->priv.health;
859
860 if (disable_health)
861 set_bit(MLX5_DROP_HEALTH_WORK, &health->flags);
862
863 del_timer_sync(&health->timer);
864 }
865
mlx5_start_health_fw_log_up(struct mlx5_core_dev * dev)866 void mlx5_start_health_fw_log_up(struct mlx5_core_dev *dev)
867 {
868 struct mlx5_core_health *health = &dev->priv.health;
869
870 if (mlx5_core_is_pf(dev) && MLX5_CAP_MCAM_REG(dev, mrtc))
871 queue_delayed_work(health->wq, &health->update_fw_log_ts_work, 0);
872 }
873
mlx5_drain_health_wq(struct mlx5_core_dev * dev)874 void mlx5_drain_health_wq(struct mlx5_core_dev *dev)
875 {
876 struct mlx5_core_health *health = &dev->priv.health;
877
878 set_bit(MLX5_DROP_HEALTH_WORK, &health->flags);
879 cancel_delayed_work_sync(&health->update_fw_log_ts_work);
880 cancel_work_sync(&health->report_work);
881 cancel_work_sync(&health->fatal_report_work);
882 }
883
mlx5_health_cleanup(struct mlx5_core_dev * dev)884 void mlx5_health_cleanup(struct mlx5_core_dev *dev)
885 {
886 struct mlx5_core_health *health = &dev->priv.health;
887
888 cancel_delayed_work_sync(&health->update_fw_log_ts_work);
889 destroy_workqueue(health->wq);
890 mlx5_reporter_vnic_destroy(dev);
891 mlx5_fw_reporters_destroy(dev);
892 }
893
mlx5_health_init(struct mlx5_core_dev * dev)894 int mlx5_health_init(struct mlx5_core_dev *dev)
895 {
896 struct devlink *devlink = priv_to_devlink(dev);
897 struct mlx5_core_health *health;
898 char *name;
899
900 if (!mlx5_dev_is_lightweight(dev)) {
901 devl_lock(devlink);
902 mlx5_fw_reporters_create(dev);
903 devl_unlock(devlink);
904 }
905 mlx5_reporter_vnic_create(dev);
906
907 health = &dev->priv.health;
908 name = kmalloc(64, GFP_KERNEL);
909 if (!name)
910 goto out_err;
911
912 strcpy(name, "mlx5_health");
913 strcat(name, dev_name(dev->device));
914 health->wq = create_singlethread_workqueue(name);
915 kfree(name);
916 if (!health->wq)
917 goto out_err;
918 INIT_WORK(&health->fatal_report_work, mlx5_fw_fatal_reporter_err_work);
919 INIT_WORK(&health->report_work, mlx5_fw_reporter_err_work);
920 INIT_DELAYED_WORK(&health->update_fw_log_ts_work, mlx5_health_log_ts_update);
921
922 return 0;
923
924 out_err:
925 mlx5_reporter_vnic_destroy(dev);
926 mlx5_fw_reporters_destroy(dev);
927 return -ENOMEM;
928 }
929